Android Open Source - Jumper Jump Dialog

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License

The source code is released under:

Copyright (c) 2011 Happytap Doug Tangren & Ryan Gravener Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Softwar...

Java Source Code

package com.happytap;
/*w  w  w .  j  a va2 s .com*/
import java.util.Collection;
import java.util.Collections;

import android.app.Dialog;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.util.TypedValue;
import android.view.Display;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager.LayoutParams;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;

/**
 * Simple Dialog intended for alpha/numeric index selection
 * 
 * @author dtangren
 */
public class JumpDialog extends Dialog {

  public interface OnJumpListener {
    void onJump(CharSequence c);
  }
  
  private static final String[] ALPHA = new String[] { 
    "A", "B", "C", "D", "E",
    "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S",
    "T", "U", "V", "W", "X", "Y", "Z", "#" 
  };
  private static final String[] NUMER = new String[] { 
    "0", "1", "2", "3", "4",
    "5", "6", "7", "8", "9", "A" 
  };
  
  private int cols = 4;
  private boolean hapticFeedback = true;
  private Collection<String> subset = Collections.<String> emptyList();
  private final OnJumpListener listener;
  private final TableLayout grid;

  public JumpDialog(Context ctx, final OnJumpListener listener) {
    super(ctx);

    this.listener = listener;

    LayoutParams lp = new LayoutParams();
    lp.x = 0;
    lp.y = 0;
    lp.width = LayoutParams.FILL_PARENT;
    lp.height = LayoutParams.FILL_PARENT;
    lp.flags = lp.flags | LayoutParams.FLAG_FULLSCREEN | LayoutParams.FLAG_BLUR_BEHIND;

    grid = new TableLayout(ctx);
    grid.setStretchAllColumns(true);
    grid.setPadding(0, 0, 0, 0);
    grid.setGravity(Gravity.TOP);
    setContentView(grid, lp);
    getWindow().setBackgroundDrawable(new ColorDrawable(0));
  }
  
  public JumpDialog inRowsOf(int n) {
    cols = n;
    return this;
  }

  public JumpDialog hapticFeedback(boolean b) {
   hapticFeedback = b;
   return this;
  }
  
  public JumpDialog only(Collection<String> subset) {
    this.subset = subset;
    return this;
  }

  @Override
  public final void onAttachedToWindow() {
    withView(ALPHA);
    grid.requestLayout();
  }

  private JumpDialog flip(boolean fromAlpha) {
    return withView(fromAlpha ? NUMER : ALPHA);
  }

  private JumpDialog withView(String[] opts) {
  grid.removeAllViews();
    TableRow row = new TableRow(getContext());
    Display display = getWindow().getWindowManager().getDefaultDisplay();
    cols = Math.min(display.getHeight(), display.getWidth()) / 80;
    for (int i = 0; i < opts.length; i++) {

      if (i % cols == 0 || i == opts.length - 1) {
        grid.addView(row);
      }

      if (i % cols == 0) {
        row = new TableRow(getContext());
        row.setGravity(Gravity.TOP);
      }

      final TextView c = new TextView(getContext());
      c.setText(opts[i]);
      c.setGravity(Gravity.CENTER);
      c.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 60);
      c.setClickable(true);
      c.setTextColor(
      subset.isEmpty() || subset.contains(opts[i]) ? Color.WHITE : Color.GRAY
      );
      if (i < opts.length - 1) {
        boolean selectable = subset.isEmpty() || subset.contains(opts[i]);
        c.setTextColor(selectable ? Color.WHITE : Color.GRAY);
        if (selectable) {
          c.setHapticFeedbackEnabled(hapticFeedback);
          c.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
              listener.onJump(c.getText());
              JumpDialog.this.dismiss();
            }
          });
        } else {
         c.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
              JumpDialog.this.cancel();
            }
          });
        }
      } else {
        c.setTextColor(Color.WHITE);
        c.setOnClickListener(new View.OnClickListener() {
          public void onClick(View v) {
            flip(ALPHA[ALPHA.length - 1].equals(c.getText()));
          }
        });
      }
      row.addView(c);
    }
    return this;
  }
}

Java Source Code List

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